Menin

Menin is a protein that in humans is encoded by the MEN1 gene. Menin is a tumor suppressor protein that is involved in transcription regulation, genome stability, cell division, and DNA repair. Mutations in the MEN1 gene can lead to the development of multiple endocrine neoplasia type 1 (MEN1), a rare hereditary disorder that primarily affects the endocrine glands.

Structure

Menin is a nuclear protein that interacts with the nucleosome remodeling and histone deacetylation (NuRD) complex. It is composed of 610 amino acids and has a molecular weight of approximately 68 kDa. The protein has no significant sequence homology with other known proteins, and its structure is unique among known proteins.

Function

Menin has multiple functions in the cell. It is involved in the regulation of several transcription factors, including JunD and NF-kappaB, which are important for cell growth and proliferation. Menin also plays a role in maintaining genome stability by participating in DNA repair and the regulation of cell division. In addition, menin is involved in the regulation of epigenetic modifications, such as histone methylation.

Clinical significance

Mutations in the MEN1 gene can lead to the development of multiple endocrine neoplasia type 1 (MEN1), a rare hereditary disorder that primarily affects the endocrine glands. This condition is characterized by the development of tumors in the parathyroid glands, pituitary gland, and pancreas. Most of these tumors are benign, but they can cause serious health problems by producing excess hormones.

See also

• Multiple endocrine neoplasia
• Tumor suppressor